4.3 Vision is equivalent to 0.1

4.3 Visual acuity is equivalent to about 0.2.

Visual acuity refers to the ability of the human eye to recognize objects clearly. In medicine, visual acuity is usually measured using Snellen chart. Standard visual acuity refers to the small letter size that the human eye can see when it is 20 feet away from the object. When a person is 5 meters away from the standard visual acuity chart and can recognize the E word on the standard visual acuity chart, his/her visual acuity is 4.3, which is usually equivalent to about 0.2.

It should be noted that human vision is affected by many factors. It is not accurate to determine the overall visual condition only by visual acuity numbers. People who are worried about their vision should seek medical advice and receive diagnosis and treatment from a professional doctor.